Automatic Star Delta Starters IEC : 2012 Compliant Direct-on-Line Starters ISI Marked-BIS Approved

Transcription

1 Agriculture Starter complying to latest standards Automatic Star Delta Starters IEC : 2012 Compliant Direct-on-Line Starters ISI Marked-BIS Approved

2 Tried, Tested and Trusted Start with Siemens Agriculture Starters For more than 125 years, Siemens has been developing and manufacturing world-class, control products. Siemens offers a wide range of starters to cater to diversified demands from Agriculture Sector.These products are specially designed to provide smart, easy and reliable motor starting solution. They employ tried and tested Siemens contactors and relay and this ensures the right start for motors requiring direct online starting or star delta starting. 2

3 Direct on line Starter (DOL) RAJA + 3TW7291-1A... Range: 0.25kW to 7.5kW 0.33HP to 10HP Method of starting A. DOL starting method: The most economical and popular method of starting squirrel cage induction motors, is direct-online, where the starter is connected directly across the supply. However, the starting current at the moment of switching Direct-on-line can be as high as 6-8 times the rated current. Advantages: High starting torque, shorter starting time, simple construction and wiring, space saving etc. Disadvantages: High starting current Applications: DOL: As we know, A direct on line starter can be used if the high inrush current of the motor does not cause excessive voltage drop in the supply circuit. It can be used to start small agriculture water pumps, compressors, fans and conveyor belts.etc. 3

4 Construction IS/IEC CM/L Contactor: The DOL starter up to 10 HP is fitted with 3TS3 Contactor. This contactor is specially designed by Siemens considering the requirements of industry as well as agriculture. Considering the specific need of the agricultural pump set applications, Siemens has designed a special wide band coil ( V). This coil operates reliably even when there is wide voltage fluctuation. The Starters will now come with 3TS Contactors which will in turn make the starter more reliable with enhanced electrical and mechanical life. 4

5 Bimetal Overload Relay: The RAJA direct-on-line starter is fitted with 3UW5 relay. These relays are computer calibrated and therefore, offer accurate protection. The main benefit of this bimetal relay is the built-in single phasing protection in addition to the overload protection. Relay has Automatic reset function after cooling time of 4 sec approx, completely reduce Manual dependency. Push buttons Push buttons are used for switching ON and OFF the starter. Twin push button comes with Locked Off feature which helps in avoiding nuisance switching ON of pump. Operation: In DOL starting, the ON push button is pressed, which energizes the contactor coil, thus switching on the circuit. When the OFF push button is pressed, the contactor is de-energized, switching off the circuit. The bimetal relay under normal functioning of motor plays no active part in the starter. But under overload, single phasing or locked rotor conditions of Motor, the bimetal relay cuts-off the supply to the contactor coil, tripping the circuit. The contactor itself provides the necessary novoltage protection in so far as it will drop out in the case of a supply failure, and for restarting on resumption of supply, the ON push button will have to be pressed again. Reliability: 3TW72 range of DOL starters are having option of V Coil voltage which takes care of wide fluctuations in supply. Accurate protection under single phasing & overload. With ISI marking, it ensures more safety for the end user. With 3TS contactors fitted into it, ensures more electrical and mechanical life of the Starter. With Locked off feature, ensures that undesirable switching on of the Starter is prohibited. No Auto start only Auto reset of Bimetal relay and it needs Manual Acknowledgement to again ON the Starter. 5

6 Key Highlights Latched OFF feature available Fitted with 3TS Contactors and 3US over load relays RAJA Starter with ISI mark 6

7 Technical Details of the Starter Table A: Motor Rating At 415V 3ph 50Hz Starter Type HP kw Range Relay 3UW51 Code ## Back-up Fuse Rating HRC type 3NA 7 Rewirable Cu Cable (mm 2 ) size Max. Full Load Current (Amp) 3Ph, 415V, 4P Squirrel Cage IS 8789:1996 Table 4 3Ph, 415V, 2P Submersible motor IS 9283:1995 Table 2 1Ph, 240V, CSIR or Split-Phase IS Table TW7291-1A* J 2A 36 SWG TW7291-1A* A 6A 34 SWG TW7291-1A* C 6A 27 SWG TW7291-1A* D 10A 26 SWG TW7291-1A* F 16A 25 SWG TW7291-1A* G 16A 24 SWG TW7291-1A* J 16A 21 SWG TW7291-1A* K 25A 19 SWG TW7291-1A* A 25A 18 SWG TW7291-1A* B 32A 18 SWG * Code for operating coil voltage, 50 Hz (B for V without tolerance W for 415V) Spare list Sr. No. Description Order No. 1 Contactor for V 3TS AZ608K 2 Contactor for V 3TS AZ608K 3 Contactor for 415V 3TS AR008K 4 Contactor for 415V 3TS AR008K 5 Relay 3UW51 02-## 6 Coil for V 3TY AZ6 7 Coil for 415V 3TY AR0 8 1NO Contact Block 3SB54200B 9 ON & OFF Push Button # # contact sales Raja + Direct-on-line Starter (For Single Phase connection) Wiring Diagram for Single-Phase Motors Note: Connect 3/L2 to 2/T1 by cable of suitable size. (Max. 4mm 2 ) 7

8 Automatic Star Delta Starter 3TE7291-0A ASD-11 Starter (Self reset) Range: 7.5kW to 18.5kW 10HP to 25HP Current/rated op. current I y = Current in Y-connection I D = Current in connection Synchronous speed Speed/rated speed In star delta starting, initially the motor windings are connected in star. This reduces the starting current by 1/3 rd of the full load current also the voltage by (1/ 3) of the rated value. As the torque is proportional to the square of the voltage, the starting torque also get reduced to 1/3rd of it s full load value. Once the motor attains approximately 80% of the rated speed, the windings get connected in the delta formation. Thus by star delta starting, the starting current is reduced to 2 to 2.5 times the rated current unlike DOL starting, where it is 7 to 8. Advantages: low starting current Disadvantages: Low / medium starting torque, longer starting time, less simpler construction and wiring, requires more space etc. 8

9 construction Automatic Star Delta Starters fitted with 3TS contactors Construction: It consists of a star-delta timer (3RP), contactor (3TS3), and overload relay (3UW51), Operation: In this starter, the changeover from star to delta is done automatically after a preset time by using a timer. 9

10 Key Highlights of Star Delta Starter Latched OFF feature available Fitted with 3TS Contactors Compact Size 10

11 Technical Details of Automatic Star Delta Starter Table A: Automatic Star - Delta Starter Type Ref: 3TE7291-0A Motor Output at 415V (kw/hp) I(fl) 4 Pole Squirrel cage motor Line current (A) Phase current (A) Contactor Line Contactor Delta Contactor Star Type Reference Recommended Overload relay at 50ºC Type - Code Relay Range (A) Recommended Fuse Switch Type Back up HRC fuse rating(a) Recommended Cu Cable size (mm 2 ) Incoming (from supply) 7.5/ TS A*08K 3TS A*08K 3TS A*08K 3UW J KL / TS A*08K 3TS A*08K 3TS A*08K 3UW K KL / TS A*08K 3TS A*08K 3TS A*08K 3UW A KL / TS A*08K 3TS A*08K 3TS A*08K 3UW B KL / TS A*08K 3TS A*08K 3TS A*08K 3UW C KL * Code for operating coil voltage 50 Hz (Z6 for V, R0 for 415V) Outgoing (tomotor) Other Tables: AC Input Voltage 230V-400V 380V-440V Star-Delta Timer: MLFB 3RP NP20 8K 3RP NM20 8K Sr. No. Description Spares: Order No. 1 Contactor for V 3TS AZ608K 2 Contactor for V 3TS AZ608K 3 Contactor for 415V 3TS AR008K 4 Contactor for 415V 3TS AR008K 5 Relay 3UW51 02 Refer Table A 6 Relay 3UW52 02 Refer Table A 7 Coil for V 3TY AZ6 8 Coil for 415V 3TY AR0 9 1NO Contact Block 3SB54200B 10 ON & OFF Push Button # # contact sales 11

12 Single line diagrams: DOL (Direct online starters) RAJA Direct-On-Line Starter (for Remote Operation) 3TW A S0 - OFF O (Red) Button S1 - ON I (Green) Button Q1 - Contactor K1 - Bimetal Relay with SPP feature S01 - Remore OFF Push Button S11 - Remote ON Push Button Diagram shows connections made for contactor coils rated V (wide-band), 415V ( V), 50Hz. For remote operation disconnect the wire between terminal 5/L3 on contactor and terminal 96 on the relay. Connect the remote OFF S01 push button as shown. Connect remote ON S11 push button parallel to S1 as shown. 12

13 ASD (Fully automatic start delta starters) Q1 - Line Contactor (+2NO) Q2 - Star Contactor (+1NO+1NC) Q3 - Delta Contactor (+1NC) S1 - ON Push Button S4 - OFF Push Button Q4 - Star Delta Timer with 1NO Instantaneous and 1NO Delayed Aux. Contact K1 - Bimetal Relay From Supply L1 L2 L3 S1 3 4 Q4 Q2 Q3 A1/A3 17 A1 1/L1 3/L2 5/L A1 1/L1 3/L2 5/L3 21 A1 1/L1 3/L2 5/L3 13/(23) 23/(13) A A2 2/T1 4/T2 6/T A2 2/T1 4/T2 6/T3 22 A2 Q1 2/T1 4/T2 6/T3 14(24) 24/(14) 1/L1 3/L2 5/L3 K1 2/T1 4/T2 6/T3 S W2 U2 V2 To Motor U1 V1 W1 To Motor Diagram shows connections made for contactor coils operating range V 50Hz (wide band) & coil rated 415V 50Hz. (13), (14), (23), (24) applicable incase of 20 HP & 25 HP. 3TE A / Automatic Star-Delta Starter Coil Voltage / Coil Operating Range = V 50Hz Motor Output at 415V (kw/hp) Relay Range 3UW51/52 (A) Recommended Backup Fuse type 3NA3(A) Recommended Cu Cable (mm sq.) Incoming Outgoing 7.5 / / / / /

14 DOL Dimensional Drawing Raja Direct On-Line Starter Mounting dimensions 154 x 70 mm and hole dia 6.5 mm 14

15 ASD Dimensional Drawing Automatic Star Delta Starter Mounting Dimensions 259 x 219 and hole Dia 7.0mm Fig. 8: Dimensional Details for 3TE A** 15

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